diff options
| author | Anthony Liguori <aliguori@us.ibm.com> | 2007-04-23 09:17:21 -0500 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-05-03 10:52:31 +0300 |
| commit | 7807fa6ca5af2e5660a0eb3cd90276ca0c5bdfc8 (patch) | |
| tree | 8f97af3538acc40a6a72af29f31351d8f0f69296 /drivers/kvm/kvm.h | |
| parent | 4c690a1e8667a84b61a6114a4ad293681f32cb11 (diff) | |
KVM: Lazy FPU support for SVM
Avoid saving and restoring the guest fpu state on every exit. This
shaves ~100 cycles off the guest/host switch.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/kvm.h')
| -rw-r--r-- | drivers/kvm/kvm.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index d1a90c5d76c..61ff085df7e 100644 --- a/drivers/kvm/kvm.h +++ b/drivers/kvm/kvm.h @@ -63,6 +63,7 @@ #define FX_BUF_SIZE (2 * FX_IMAGE_SIZE + FX_IMAGE_ALIGN) #define DE_VECTOR 0 +#define NM_VECTOR 7 #define DF_VECTOR 8 #define TS_VECTOR 10 #define NP_VECTOR 11 @@ -301,6 +302,7 @@ struct kvm_vcpu { char fx_buf[FX_BUF_SIZE]; char *host_fx_image; char *guest_fx_image; + int fpu_active; int mmio_needed; int mmio_read_completed; |